add oneoff redirect

lib/redirects/get-old-paths-from-permalink.js

@@ -99,6 +99,15 @@ module.exports = function getOldPathsFromPath (currentPath, languageCode, curren
   }
   // ------ END MODERN VERSION FORMAT REPLACEMENTS ------//
 
+  // ------ BEGIN ONEOFF REPLACEMENTS ------//
+
+  // create special old path /enterprise-server-releases from current path /enterprise-server@<release>/admin/all-releases
+  if (versionSatisfiesRange(currentVersion, `=${latest}`) && currentPath.endsWith('/admin/all-releases')) {
+    oldPaths.add('/enterprise-server-releases')
+  }
+
+  // ------ END ONEOFF REPLACEMENTS ------//
+
   // For each old path added to the set above, do the following...
   (new Set(oldPaths)).forEach(oldPath => {
     // for English only, remove language code